Specifications [ EMD SD40 ]
GM Electro-Motive Division (EMD) / General Motors Diesel (GMD) - United States-Canada
1966 - 1972
20.0m | 65.7 ft
NOTE: May include length of entire train set
(360,065 lb | 180 US Tons)
1 x EMD 16-645-E3 V16 turbocharged diesel unit with AR-10 primary alternator and D14 auxiliary alternator.
Engine / Drive Source
D-77 traction motors.
Traction Motor / Sets
Rated Output Power
(Loco Facing Left)
SD40 - Base Series Designation.
EMD 434 - Test-frame SD40 built atop the framework of an SD35 loco in July 1964.
SD40A - Lengthened SDP45 frames with larger fuel tanks built for exclusively for Illinois Central Railroad.
SD40-2 - Modernized / upgraded (Dash 2) variant.
SD40-3 - Modernized / rebuilt SD40s.
SD40R - Rebuilt SD40 for Southern Pacific fleet; 1980-1981.
SD40M-2 - Morrison Knudsen rebuilds of SD40 units for Southern Pacific; 30 examples.
SD40-2XR - SD50 3,500hp loco rebuild for Norfolk Souther Railway with 3,000hp output.